EP3172468A1 - Fluid-circulation valve, in particular for a motor vehicle, with thrust washer and method for manufacturing such a valve - Google Patents

Fluid-circulation valve, in particular for a motor vehicle, with thrust washer and method for manufacturing such a valve

Info

Publication number
EP3172468A1
EP3172468A1 EP15759856.6A EP15759856A EP3172468A1 EP 3172468 A1 EP3172468 A1 EP 3172468A1 EP 15759856 A EP15759856 A EP 15759856A EP 3172468 A1 EP3172468 A1 EP 3172468A1
Authority
EP
European Patent Office
Prior art keywords
shaft
valve
valve body
flat washer
shutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP15759856.6A
Other languages
German (de)
French (fr)
Inventor
Michael SANCHES
Guillaume Davoult
Thierry Lanoe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes de Controle Moteur SAS
Original Assignee
Valeo Systemes de Controle Moteur SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of EP3172468A1 publication Critical patent/EP3172468A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/224—Details of bearings for the axis of rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/106—Sealing of the valve shaft in the housing, e.g. details of the bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/72—Housings

Definitions

  • the present invention relates to a fluid circulation valve, particularly for a motor vehicle and a method of manufacturing such a valve.
  • fluid flow valves comprising a body having a fluid passage duct, a flap, a shaft, free in rotation, on which is fixed the flap, and a rotary control member for rotation of the shaft.
  • the rotation of the flap makes it possible to regulate the flow of fluid flowing in the duct.
  • the rotation of the control member and therefore of the shutter is controlled by an electric motor, against the action of a torsion spring of the control member.
  • the return spring maintains the control member in a predetermined position of opening or closing the valve, in the absence of actuation of the valve.
  • the shaft is for example made of a metal rod.
  • the control member comprises a plate and a toothed sector of plastic material overmolded on the plate.
  • the metal rod is secured to the control member by stamping an axial end of the rod in a hole of the plate.
  • the control member is overmolded on the metal rod.
  • distal end At the opposite end of the shaft (hereinafter distal end) it is known to form a stop for keeping the shaft in position in the valve body, in cooperation with a pulling action of the return spring. in torsion, exerted on the shaft via the control member.
  • a folded washer fitted and welded to the cylindrical portion of the shaft.
  • a stepped bearing may be arranged to guide the shaft in rotation.
  • Such an embodiment of the stop has good resistance to friction and vibration. However, it has a large axial size.
  • a stop at the distal end of the shaft is made by means of a pin fitted in the valve body and fixed at the distal end of the shaft.
  • the pin assembly also has a large footprint.
  • the invention aims to overcome the problems mentioned above and proposes in this sense a fluid circulation valve, particularly for a motor vehicle, comprising a valve body having a conduit for the passage of a fluid, a shutter shutter of driven, a shaft on which is fixed the shutter, a rotary control member of the shaft, fixed to the a level of a proximal end of the shaft and whose rotation selectively controls the opening and closing of the conduit by the shutter, and a torsion spring of the control member, a stop being provided at the level of a distal end of the shaft, opposite to the proximal end, for maintaining in axial position the shutter in the conduit by cooperation with the valve body, against a force of the return spring, the stop having a flat washer fixed on the lateral end of the tree.
  • the positioning of the shaft in the valve body is ensured by means of a flat washer fixed on the lateral end of the shaft.
  • a flat washer fixed on the lateral end of the shaft.
  • Such a solution is notably more compact than the known solution implementing a folded washer fitted at the end of the shaft.
  • the solution proposed here does not require, moreover, particular surface treatment.
  • the lateral end on which is fixed the flat washer has a circular groove, the weld bead between the lateral end of the shaft and the flat washer being received in the groove.
  • the lateral end on which is fixed the flat washer has a centering stud, the groove being preferably formed at the base of the centering stud.
  • a distal bearing for rotating the shaft relative to the valve body is interposed between the flat washer and the valve body, the flat washer now in contact with the distal bearing against the valve body.
  • the valve body has a shoulder forming a receiving housing of the distal bearing.
  • valve comprises a proximal bearing for guiding the shaft in rotation relative to the valve body, opposite, with respect to the shutter, to the flat washer, a seal being preferably arranged axially between the proximal bearing and the body of the valve; valve.
  • the valve comprises a guide sleeve in rotation of the shaft relative to the valve body, with an integrated seal, opposite to the shutter, to the flat washer.
  • the invention also relates to a method for manufacturing a fluid circulation valve, particularly a valve for a motor vehicle, comprising the steps of:
  • the washer being welded to the lateral end of the shaft, the weld bead being preferably formed in a groove.
  • a plating force of the washer on the valve body or a distal bearing, and a plating force of the shaft on the flat washer are applied, the plating force of the flat washer on the body valve, or the distal bearing, being greater than the thrust force of the shaft on the flat washer.
  • the method comprises a step of forming a centering stud on the lateral end of the shaft, intended to be the opposite end of the shaft relative to the control member, and a groove the base of the nipple.
  • Figure 1 is an axial sectional view of a portion of an embodiment of a fluid circulation valve.
  • FIG. 2 is a perspective view of the assembly of the control shaft and of the drive member of the valve of FIG. 1.
  • FIG. 3 shows, in perspective, a plate of the drive member of FIG. 2.
  • FIG. 4 is a diagrammatic sectional view of an enlargement of a detail of FIG.
  • FIG. 5 illustrates the same detail of FIG. 4, during a step of manufacturing the valve of FIG. 1.
  • the invention relates to a fluid circulation valve 1, in particular for a motor vehicle.
  • This is a valve for adjusting the intake gas flow of a heat engine, in particular a metering valve for a diesel engine.
  • the valve comprises a body 2 inside which is formed a conduit 3 for circulating the fluid.
  • the body 2 is here intended to be mounted, by means of connections, on an engine intake line so that the portion of the gases flowing in this branch passes through the duct and is directed towards the engine to participate in the combustion. .
  • the connections and the intake line have not been shown, being well known in themselves.
  • a shaft 4 free in rotation with, integral with it, a flap 5 for closing more or less the duct 3 according to the angular position of the shaft 4, as illustrated by the arrow marked 20 rotating about the longitudinal axis A of the shaft 4.
  • the shaft 4 is connected in rotation to the shutter 5 by fasteners 14, here a screw-nut system, or the like, which allows the shutter to rotate with the shaft between two extreme positions of which the one, fully open, as in Figure 1, passes the fluid, and the other, not shown, blocks its passage, the flap then being applied against the side wall of the duct 3.
  • fasteners 14 here a screw-nut system, or the like, which allows the shutter to rotate with the shaft between two extreme positions of which the one, fully open, as in Figure 1, passes the fluid, and the other, not shown, blocks its passage, the flap then being applied against the side wall of the duct 3.
  • the valve 1 further comprises, for example, pivot connection means between the body 2 and the shaft 4, here two lower (or distal) bearings 6 and upper (or proximal) 7, for the rotary movement of the shaft 4 with respect to its longitudinal axis.
  • two aligned holes 9A, 9B are formed in the body 2, perpendicular to the conduit 3, passing diametrically through it, to form housings, of circular section, of passage of the shaft 4. They respectively receive the connecting means pivots, namely the two bearings 6, 7.
  • These are cylindrical annular section and are, in this example, forcibly mounted in the holes 9A, 9B so as to be immobilized in position, in rotation and in translation, relative to the body 2 of the valve.
  • These fixed bearings 6, 7 are made, for example, of a material which provides them self-lubricating properties and anticorrosive appropriate providing increased durability. For this, they can be made of an alloy of copper and nickel or tin, or a stainless steel.
  • the shaft 4 which can thus freely rotate about the axis A, by a sliding fit provided between the shaft and the bearings.
  • the end 1 1 of the shaft described as lower than that of FIG. 1, engages in the corresponding bearing 6, while the other upper end 12 passes through the other bearing 7 and opens outwards. of the body 2 of the valve 1 to be connected to a member 21 for controlling the rotation of the shaft 4.
  • control member 21 is, for example, a toothed sector wheel 22 comprising a central portion 24 centered on the shaft 4 and a radial protuberance 26, forming a corner sector. slightly greater than the angular clearance of the flap and provided with gear teeth 28.
  • the toothed sector 22 is here rotatably connected to a return wheel 30 free in rotation with respect to the body 2 about an axis of articulation 32 parallel to the longitudinal axis A of the shaft 4.
  • the valve 1 further comprises an electric motor, not shown, including a stepper motor.
  • the electric motor meshes with a large pinion 36 of the idler wheel 30 while the toothed sector 22 meshes with a small pinion 37 of the latter.
  • the actuation of the motor thus causes a rotation of the return wheel 30 which in turn causes rotation of the toothed sector 22 and thus of the flap 5 via the shaft 4.
  • the control member 21, the intermediate wheel 30 and / or the motor are positioned in a housing 38 of the valve closed by a cover 40.
  • the valve may further comprise a torsion spring 42 for positioning the flap 5 in a rest position, here an open position.
  • the torsion spring 42 is a return spring in position of the control member 21. By position of rest, one hears a position taken when the motor of the valve is not actuated.
  • the torsion spring 42 is supported, on the one hand on the body 2, here via an upper shoulder 44, and on the control member 21, at a slot 46 ( Figure 2).
  • the torsion spring 42 is centered, in particular, on the longitudinal axis A.
  • control member 21 is overmolded on the shaft 4. In this way there is ensured a connection without play between these two parts. We can also pre-assemble them before mounting in the body 2.
  • the control member 21 is, for example, plastic material and / or the shaft is, for example, metal, especially stainless steel.
  • the control member 21 here comprises walls forming a well 48, extending axially beyond a wall 50 extending radially, in particular orthogonal to the shaft 4, and carrying the gear teeth 28.
  • L control member is overmolded on the shaft 4 at the well 48.
  • the shaft may further comprise a groove 52 in which the control member 4 is overmolded.
  • the well 48 and / or the groove 52 contribute to an effective connection of the control member 21 and the shaft.
  • the valve 1 may also comprise a plate 54, in particular a metal plate, defining one or more radial stops 56, 56 '(FIGS. 2 and 3) delimiting an angular stroke of the control member 21. More specifically, the plate 54 is rotatably connected to the shaft 4 and overmolded by the control member 21. Furthermore, in the extreme angular positions of the valve 1, the radial stops 56, 56 'come into contact with non-visible shapes formed in the body 2 of the valve. In this way, the angular displacement of the control member 21 is defined. As best seen in Figure 3, the plate 54 comprises two radial arms 58, 58 'respectively terminated by the radial stops 56, 56'.
  • the plate 54 also has, at the intersection of the arms 58, 58 ', an orifice 60 for the passage of the shaft 4.
  • the shaft 4 and the through hole 60 are mutually configured to ensure a transmission of the forces of Radial abutment of the plate 54 to the shaft 4.
  • the shaft 4 here has a flat portion 62 ( Figure 1) and the passage hole 60 a straight portion 64.
  • the shaft 4 is adjusted in the hole of passage 60 so that the flat 62 bears against the straight portion 64.
  • the toothed sector 22 is thus not biased during abutments of the plate 54 against the body 2.
  • the valve 1 further comprises a sensor target 66.
  • a sensor target 66 such as a flat magnet, that is to say a rectangular parallelepipedic magnet whose two largest faces are arranged perpendicular to the axis of rotation A of the control member 21.
  • the magnet 66 generates a magnetic field for influencing a magnetic sensor 68, in particular a Hall effect probe, here positioned on the cover 40 of the valve 1.
  • the flat magnet 66 is substantially rectangular parallelepiped. It has two faces oriented orthogonal to the longitudinal axis A of the shaft 4. It is also centered on the longitudinal axis A.
  • the flat magnet locally generates in this manner parallel field lines, in a plane orthogonal to the longitudinal axis A.
  • the angular positioning of the control member 21 and therefore the position of the flap 5 correspond to an identical angular positioning of the field lines, which makes the measurement more reliable.
  • the valve 1 further comprises a housing 70 for receiving the sensor target 66.
  • the housing 70 is advantageously derived from the molding of the control member 21 so as to also reduce the angular gaps between the moving parts of the valve 1. Such a way of producing the housing 70 also makes it possible to limit the number of operations necessary for the manufacture of the valve.
  • the sensor target 66 is, however, inserted in the housing 70, after the formation of this housing 70. Thus, the housing 70 is not obtained by overmolding the sensor target 66. This makes it possible to avoid damaging the sensor target during the molding operation of the control member 21.
  • the housing 70 is formed here of four walls 72.
  • the housing 70 and the sensor target 66 preferably have complementary shapes, including rectangular parallelepiped shapes.
  • the sensor target 66 is, for example, positioned flat on a bottom of the housing 70.
  • the walls 72 of the housing 70 also have a tongue 74 projecting from the axis A of rotation of the control member 21. These tabs 74 are folded over the sensor target 66 to ensure its retention in the housing 70, once the sensor target 66 inserted into the housing 70.
  • the shaft 4 as illustrated in the figures also comprises an axial abutment 76, located at the end 1 1 of the shaft, opposite the control member 21 (that is to say opposite to the end of the shaft 4 at which is fixed the control member 21).
  • this end 1 1 is called the distal end of the shaft 4, with reference to the control member 21 which is fixed at the proximal end of the shaft 4.
  • the longitudinal segment 78 of the shaft 4 extending from the shutter 5 to the control member 21 does not have to cooperate with an axial stop, the latter being provided in the distal portion of the shaft 4.
  • the segment 78 is called thereafter free zone.
  • This axial abutment 76 makes it possible to keep the shutter 5 in the axial position in the duct 3, in cooperation with the valve body 2, against a tensile force of the torsion return spring 42 on the shaft 4. Traction effort tends to remove the shaft 4 from the holes 9A and 9B.
  • the free zone 78 is more particularly located here from an upper end 80 of a slot 82 for fixing the shutter 5 to a lower end 84 of the well 48. In other words, the free zone 78 is located at the right of the passage 9B of the control shaft 4 towards the housing 38 accommodating the control member 21.
  • the axial abutment 76 comprises a flat washer 102, fixed on the distal end 1 1 of the shaft 4, that is to say on the circular surface of this distal end 1 1 of the shaft 4, perpendicular to the axis A of the shaft 4.
  • the use of a flat washer 102 allows for a stop with a small axial size. Fixing the flat washer 102 on the lateral end of the shaft avoids the obligation to carry out expensive surface treatments.
  • Fixing the flat washer 102 on the distal end 1 1 of the shaft 4 may in particular be made by welding.
  • the weld bead between the washer 102 and the distal end 11 of the shaft extends over an angular sector of 360 °, the cord preferably still forming a circle.
  • the weld bead may have other shapes; it can also be discontinuous.
  • this weld bead does not imply an extra thickness with respect to the surface of the distal end 1 1 of the shaft 4 and the washer 102 rests on substantially the entire surface of the lateral end of the shaft not forming the groove.
  • this groove 104 is, as represented in FIG. 4, made at the foot or at the base of a centering stud 106 formed on the surface of the lateral end 1 1 and intended to cooperate with the central opening. in the washer 102 to ensure the centering of this washer 102 relative to the shaft 4.
  • the centering pin 106 is formed by machining the distal end 1 1 of the shaft 4, which machining naturally forms a groove at the foot of the pin 106.
  • the section of the groove 104 is here represented in the form of a semicircle, but this section can be of different shape. In particular, the section of the groove may have a chamfer on a radially outer portion.
  • the groove 104 also makes it possible to minimize the concentrations of mechanical stresses in the shaft 4.
  • the axial stop 76 and the body 2 are, advantageously, mutually configured to axially lock the washer 102 on the body 2 in a first direction, facing the control member 21, the first direction corresponding to the direction of a force axial printed to the shaft by the torsion spring 42.
  • the bearing 6 is interposed between the washer 102 and the valve body 2.
  • this stepped bearing 6 is here received in a housing of complementary shape formed by a shoulder in the body of valve 102.
  • the washer 102 maintains this bearing 6 against the valve body 2.
  • valve is configured so that the axial stop is also locked axially in a second direction, opposite to the first direction.
  • control member 21 comprises a slot 46.
  • the latter accommodates one end of a torsion spring 42, not shown in this figure but visible in the figure 1.
  • the slot 46 passes axially through the wall 50 of the control member 21.
  • the slot 46 advantageously defines two attachment positions for the torsion spring 42.
  • the slot 46 is oriented, for example, along a corner sector, centered on the longitudinal axis A of the shaft 4.
  • the slot 46 defines in this way an attachment position of the torsion spring 42 at each of its angular ends.
  • valve body is made prior to mounting the parts mentioned above in the valve body 2, for example by molding.
  • the assembly of the parts can then take place as follows.
  • a seal 100 and the upper 7 and lower 6 bearings are arranged in the body 2 respectively at respective shoulders, the first shoulder.
  • the upper bearing assembly 7 and seal 100 may, alternatively, be replaced by a guide sleeve of the shaft 4 with an integrated seal.
  • the movable assembly comprising the control member 21 and the shaft 4 is then mounted in the through holes 9A, 9B being introduced from top to bottom, the torsion spring 42 having been installed between the control member 21 and the body 2.
  • the washer 102 is then centered on the distal end 1 1 of the shaft by means of the centering stud 106, which is preferably machined on the shaft 4, prior to the insertion thereof into the valve body. .
  • the flat washer 102 is then fixed in particular welded on the surface of the distal end 1 1 of the shaft 4.
  • the weld bead is in this case formed in the groove 104 as mentioned above.
  • the washer 102 is subjected to a double force:
  • a valve as just described finds its applications in particular as a fluid circulation valve for a motor vehicle.
  • a valve can be used as a gas metering valve internal combustion engines or as an exhaust gas recirculation valve or EGR valve.
  • the groove 104 can be made at any radial level on the surface of the distal end 11 of the shaft 4, even if the groove presented has the advantage of not requiring any additional operation to be performed, since it is formed naturally by the machining of the distal end 1 1 of the shaft 4 to form the centering stud 106.

Abstract

The invention relates to a fluid-circulation valve for a motor vehicle, comprising a valve body (2) having a duct (3), a shutter (5) of the duct (3) attached to a shaft (4), a rotary member (21) for controlling the shaft (4), attached to a proximal end (12) of the shaft (4), the rotation of which selectively controls the opening and the closing of the duct (3) by the shutter (5), and a torsional return spring (42) of the control member (21), an abutment (76) being provided at a distal end (11) of the shaft (4), opposite the proximal end (12), such as to maintain the shutter (5) in axial position in the duct (3) by engaging with the valve body (2), against a force of the return spring (42), the abutment (76) comprising a flat washer (102) attached to the side end (11) of the shaft (4).

Description

VANNE DE CIRCULATION DE FLUIDE, NOTAMMENT POUR VÉHICULE AUTOMOBILE, À RONDELLE DE BUTÉE ET PROCÉDÉ DE FABRICATION  FLUID CIRCULATION VALVE, IN PARTICULAR FOR MOTOR VEHICLE, WITH STOP WASHER AND METHOD OF MANUFACTURE
D'UNE TELLE VANNE  SUCH A VALVE
La présente invention concerne une vanne de circulation de fluide, notamment pour véhicule automobile et un procédé de fabrication d'une telle vanne. The present invention relates to a fluid circulation valve, particularly for a motor vehicle and a method of manufacturing such a valve.
Elle est plus particulièrement destinée à des applications en tant que vanne doseuse de gaz d'admission de moteurs à combustion interne, qu'ils soient à essence ou Diesel. Elle pourra aussi trouver ses applications en tant que vanne de recirculation de gaz d'échappement ou « vanne EGR » (EGR pour « Exhaust Gas Recirculation »). D'autres applications de la vanne conforme à l'invention sont également possibles sans sortir du cadre de l'invention.  It is more particularly intended for applications as an intake gas metering valve of internal combustion engines, whether gasoline or diesel. It can also find its applications as an exhaust gas recirculation valve or "EGR valve" (EGR for "Exhaust Gas Recirculation"). Other applications of the valve according to the invention are also possible without departing from the scope of the invention.
Il est connu des vannes de circulation de fluide comportant un corps présentant un conduit de passage du fluide, un volet, un arbre, libre en rotation, sur lequel est fixé le volet, et un organe rotatif de commande en rotation de l'arbre. La rotation du volet permet de régler le débit de fluide circulant dans le conduit. La rotation de l'organe de commande et donc du volet est commandée par un moteur électrique, à encontre de l'action d'un ressort de rappel en torsion de l'organe de commande. Le ressort de rappel maintient l'organe de commande dans une position prédéterminée d'ouverture ou de fermeture de la vanne, en l'absence d'actionnement de la vanne.  It is known fluid flow valves comprising a body having a fluid passage duct, a flap, a shaft, free in rotation, on which is fixed the flap, and a rotary control member for rotation of the shaft. The rotation of the flap makes it possible to regulate the flow of fluid flowing in the duct. The rotation of the control member and therefore of the shutter is controlled by an electric motor, against the action of a torsion spring of the control member. The return spring maintains the control member in a predetermined position of opening or closing the valve, in the absence of actuation of the valve.
L'arbre est par exemple constitué d'une tige métallique. L'organe de commande comprend une platine et un secteur denté en matière plastique surmoulé sur la platine. La tige métallique est assujettie à l'organe de commande par matriçage d'une extrémité axiale de la tige dans un orifice de la platine. En variante, l'organe de commande est surmoulé sur la tige métallique. Au niveau de l'extrémité opposée de l'arbre (ci-après extrémité distale) il est connu de former une butée destinée à maintenir l'arbre en position dans le corps de vanne, en coopération avec une action de traction du ressort de rappel en torsion, exercée sur l'arbre via l'organe de commande. The shaft is for example made of a metal rod. The control member comprises a plate and a toothed sector of plastic material overmolded on the plate. The metal rod is secured to the control member by stamping an axial end of the rod in a hole of the plate. In a variant, the control member is overmolded on the metal rod. At the opposite end of the shaft (hereinafter distal end) it is known to form a stop for keeping the shaft in position in the valve body, in cooperation with a pulling action of the return spring. in torsion, exerted on the shaft via the control member.
Pour ce faire, il est connu de fixer au niveau de l'extrémité distale de l'arbre, une rondelle pliée emmanchée puis soudée sur la partie cylindrique de l'arbre. Entre cette rondelle pliée et le corps de vanne, il peut être disposé un palier épaulé pour guider en rotation l'arbre.  To do this, it is known to fix at the distal end of the shaft, a folded washer fitted and welded to the cylindrical portion of the shaft. Between this folded washer and the valve body, a stepped bearing may be arranged to guide the shaft in rotation.
Une telle réalisation de la butée présente une bonne résistance aux frottements et aux vibrations. Cependant, elle présente un encombrement axial important.  Such an embodiment of the stop has good resistance to friction and vibration. However, it has a large axial size.
D'autres montages ont été proposés pour assurer le maintien en position de l'arbre dans le corps de vanne.  Other arrangements have been proposed to maintain the position of the shaft in the valve body.
Tout d'abord, il a été proposé de réaliser une butée au moyen d'un circlip inséré dans une rainure sur l'arbre, le circlip étant pris en sandwich entre deux pièces fixes, par exemple entre un palier et le corps de vanne. Dans ce cas, la position de l'arbre est assurée indépendamment de l'action du ressort de rappel. En outre, la rainure peut a priori être située à tout niveau de l'arbre. Une telle solution est compacte et simple à assembler.  First, it has been proposed to make a stop by means of a circlip inserted in a groove on the shaft, the circlip being sandwiched between two fixed parts, for example between a bearing and the valve body. In this case, the position of the shaft is ensured independently of the action of the return spring. In addition, the groove may a priori be located at any level of the tree. Such a solution is compact and simple to assemble.
Selon un autre montage proposé, une butée au niveau de l'extrémité distale de l'arbre est réalisée au moyen d'une goupille emmanchée dans le corps de vanne et fixée au niveau de l'extrémité distale de l'arbre.  According to another proposed arrangement, a stop at the distal end of the shaft is made by means of a pin fitted in the valve body and fixed at the distal end of the shaft.
Dans les deux cas cependant, un traitement de surface coûteux est nécessaire pour assurer que le montage résiste aux vibrations et aux frottements. Le montage à goupille présente également un encombrement important.  In both cases, however, expensive surface treatment is required to ensure that the fixture is vibration and friction resistant. The pin assembly also has a large footprint.
L'invention a pour objectif de pallier les problèmes évoqués plus haut et propose en ce sens une vanne de circulation de fluide, notamment pour véhicule automobile,, comportant un corps de vanne présentant un conduit de passage d'un fluide, un volet obturateur du conduit, un arbre sur lequel est fixé le volet obturateur, un organe rotatif de commande de l'arbre, fixé au niveau d'une extrémité proximale de l'arbre et dont la rotation commande sélectivement l'ouverture et la fermeture du conduit par le volet obturateur, et un ressort de rappel en torsion de l'organe de commande, une butée étant prévue au niveau d'une extrémité distale de l'arbre, opposée à l'extrémité proximale, pour maintenir en position axiale le volet obturateur dans le conduit par coopération avec le corps de vanne, contre un effort du ressort de rappel, la butée comportant une rondelle plate fixée sur l'extrémité latérale de l'arbre. The invention aims to overcome the problems mentioned above and proposes in this sense a fluid circulation valve, particularly for a motor vehicle, comprising a valve body having a conduit for the passage of a fluid, a shutter shutter of driven, a shaft on which is fixed the shutter, a rotary control member of the shaft, fixed to the a level of a proximal end of the shaft and whose rotation selectively controls the opening and closing of the conduit by the shutter, and a torsion spring of the control member, a stop being provided at the level of a distal end of the shaft, opposite to the proximal end, for maintaining in axial position the shutter in the conduit by cooperation with the valve body, against a force of the return spring, the stop having a flat washer fixed on the lateral end of the tree.
Ainsi, selon l'invention, le maintien en position de l'arbre dans le corps de vanne est assuré au moyen d'une rondelle plate fixée sur l'extrémité latérale de l'arbre. Une telle solution est notamment plus compacte que la solution connue mettant en œuvre une rondelle pliée emmanchée à l'extrémité de l'arbre. La solution proposée ici ne nécessite pas, par ailleurs, de traitement de surface particulier.  Thus, according to the invention, the positioning of the shaft in the valve body is ensured by means of a flat washer fixed on the lateral end of the shaft. Such a solution is notably more compact than the known solution implementing a folded washer fitted at the end of the shaft. The solution proposed here does not require, moreover, particular surface treatment.
Selon différents modes de réalisation, qui pourront être pris ensemble ou séparément :  According to different embodiments, which can be taken together or separately:
- l'extrémité latérale sur laquelle est fixée la rondelle plate présente une gorge circulaire, le cordon de soudure entre l'extrémité latérale de l'arbre et la rondelle plate étant reçu dans la gorge.  - The lateral end on which is fixed the flat washer has a circular groove, the weld bead between the lateral end of the shaft and the flat washer being received in the groove.
- l'extrémité latérale sur laquelle est fixée la rondelle plate présente un téton de centrage, la gorge étant, de préférence, formée à la base du téton de centrage.  - The lateral end on which is fixed the flat washer has a centering stud, the groove being preferably formed at the base of the centering stud.
- un palier distal de guidage en rotation de l'arbre par rapport au corps de vanne est interposé entre la rondelle plate et le corps de vanne , la rondelle plate maintenant en contact le palier distal contre le corps de vanne .  - A distal bearing for rotating the shaft relative to the valve body is interposed between the flat washer and the valve body, the flat washer now in contact with the distal bearing against the valve body.
- le corps de vanne présente un épaulement formant un logement de réception du palier distal.  - The valve body has a shoulder forming a receiving housing of the distal bearing.
- la vanne comprend un palier proximal de guidage en rotation de l'arbre par rapport au corps de vanne, opposé, par rapport au volet obturateur , à la rondelle plate, un joint étant de préférence disposé axialement entre le palier proximal et le corps de vanne. - la vanne comprend une douille de guidage en rotation de l'arbre par rapport au corps de vanne , avec un joint intégré, opposée, par rapport au volet obturateur, à la rondelle plate . the valve comprises a proximal bearing for guiding the shaft in rotation relative to the valve body, opposite, with respect to the shutter, to the flat washer, a seal being preferably arranged axially between the proximal bearing and the body of the valve; valve. - The valve comprises a guide sleeve in rotation of the shaft relative to the valve body, with an integrated seal, opposite to the shutter, to the flat washer.
L'invention se rapporte également à un procédé de fabrication d'une vanne de circulation de fluide, notamment d'une vanne pour véhicule automobile, comprenant les étapes consistant à :  The invention also relates to a method for manufacturing a fluid circulation valve, particularly a valve for a motor vehicle, comprising the steps of:
a) mouler un corps de vanne présentant un conduit à obturer au moyen d'un volet obturateur,  a) molding a valve body having a pipe to be closed by means of a shutter,
b) insérer un arbre dans le corps de vanne pour que le volet obturateur soit reçu dans le conduit, et  b) inserting a shaft into the valve body so that the shutter is received in the conduit, and
c) fixer une rondelle plate sur une extrémité latérale de l'arbre opposée à un organe de commande.  c) fix a flat washer on a lateral end of the shaft opposite to a control member.
- la rondelle étant soudée sur l'extrémité latérale de l'arbre, le cordon de soudure étant de préférence formé dans une gorge.  - The washer being welded to the lateral end of the shaft, the weld bead being preferably formed in a groove.
- pendant la soudure, un effort de plaquage de la rondelle sur le corps de vanne ou un palier distal, et un effort de plaquage de l'arbre sur la rondelle plate sont appliqués, l'effort de plaquage de la rondelle plate sur le corps de vanne, ou le palier distal, étant supérieur à l'effort de plaquage de l'arbre sur la rondelle plate.  during the welding, a plating force of the washer on the valve body or a distal bearing, and a plating force of the shaft on the flat washer are applied, the plating force of the flat washer on the body valve, or the distal bearing, being greater than the thrust force of the shaft on the flat washer.
- le procédé comprend une étape de formation d'un téton de centrage sur l'extrémité latérale de l'arbre, destinées à être l'extrémité opposée de l'arbre par rapport à l'organe de commande, et d'une gorge à la base du téton.  the method comprises a step of forming a centering stud on the lateral end of the shaft, intended to be the opposite end of the shaft relative to the control member, and a groove the base of the nipple.
Les figures annexées feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.  The appended figures will make it clear how the invention can be realized. In these figures, identical references designate similar elements.
La figure 1 est une vue en coupe axiale d'une partie d'un exemple de réalisation d'une vanne de circulation de fluide.  Figure 1 is an axial sectional view of a portion of an embodiment of a fluid circulation valve.
La figure 2 est vue, en perspective, de l'ensemble de l'arbre de commande et de l'organe d'entraînement de la vanne de la figure 1 .  FIG. 2 is a perspective view of the assembly of the control shaft and of the drive member of the valve of FIG. 1.
La figure 3 montre, en perspective une platine de l'organe d'entraînement de la figure 2. La figure 4 représente schématiquement en coupe un agrandissement d'un détail de la figure 1 . FIG. 3 shows, in perspective, a plate of the drive member of FIG. 2. FIG. 4 is a diagrammatic sectional view of an enlargement of a detail of FIG.
La figure 5 illustre le même détail de la figure 4, durant une étape de fabrication de la vanne de la figure 1 .  FIG. 5 illustrates the same detail of FIG. 4, during a step of manufacturing the valve of FIG. 1.
Comme illustré à la figure 1 , l'invention concerne une vanne 1 de circulation de fluide, notamment pour véhicule automobile. Il s'agit ici d'une vanne de réglage du débit de gaz d'admission d'un moteur thermique, en particulier d'une vanne doseuse pour moteur diesel.  As illustrated in FIG. 1, the invention relates to a fluid circulation valve 1, in particular for a motor vehicle. This is a valve for adjusting the intake gas flow of a heat engine, in particular a metering valve for a diesel engine.
La vanne comprend un corps 2 à l'intérieur duquel est ménagé un conduit 3 de circulation du fluide. Le corps 2 est ici destiné à être monté, par l'intermédiaire de raccords, sur une ligne d'admission du moteur de manière que la partie des gaz circulant dans cette dérivation traverse le conduit et soit dirigée vers le moteur pour participer à la combustion. Les raccords et la ligne d'admission n'ont pas été représentés, étant bien connus en eux-mêmes.  The valve comprises a body 2 inside which is formed a conduit 3 for circulating the fluid. The body 2 is here intended to be mounted, by means of connections, on an engine intake line so that the portion of the gases flowing in this branch passes through the duct and is directed towards the engine to participate in the combustion. . The connections and the intake line have not been shown, being well known in themselves.
Dans le corps 2 de la vanne 1 , issu généralement de fonderie, sont reçus un arbre 4, libre en rotation avec, solidaire de celui-ci, un volet 5 permettant d'obturer plus ou moins le conduit 3 en fonction de la position angulaire de l'arbre 4, comme illustré par la flèche repérée 20 tournant autour de l'axe longitudinal A de l'arbre 4.  In the body 2 of the valve 1, generally from a foundry, are received a shaft 4, free in rotation with, integral with it, a flap 5 for closing more or less the duct 3 according to the angular position of the shaft 4, as illustrated by the arrow marked 20 rotating about the longitudinal axis A of the shaft 4.
L'arbre 4 est lié en rotation au volet d'obturation 5 par des organes de fixation 14, ici un système vis-écrous, ou autres, ce qui permet au volet de pouvoir tourner avec l'arbre entre deux positions extrêmes dont l'une, ouverte totalement, comme sur la figure 1 , laisse passer le fluide, et dont l'autre, non illustrée, bloque son passage, le volet étant alors appliqué contre la paroi latérale du conduit 3.  The shaft 4 is connected in rotation to the shutter 5 by fasteners 14, here a screw-nut system, or the like, which allows the shutter to rotate with the shaft between two extreme positions of which the one, fully open, as in Figure 1, passes the fluid, and the other, not shown, blocks its passage, the flap then being applied against the side wall of the duct 3.
La vanne 1 comprend en outre, par exemple, des moyens de liaison pivot entre le corps 2 et l'arbre 4, ici deux paliers inférieur (ou distal) 6 et supérieur (ou proximal) 7, pour le mouvement rotatif de l'arbre 4 par rapport à son axe longitudinal.  The valve 1 further comprises, for example, pivot connection means between the body 2 and the shaft 4, here two lower (or distal) bearings 6 and upper (or proximal) 7, for the rotary movement of the shaft 4 with respect to its longitudinal axis.
Plus particulièrement, deux trous alignés 9A, 9B sont ménagés dans le corps 2, perpendiculairement au conduit 3 en passant diamétralement par celui-ci, pour former des logements, de section circulaire, de passage de l'arbre 4. Ils reçoivent respectivement les moyens de liaison pivots, à savoir les deux paliers 6, 7. Ceux-ci sont cylindriques de section annulaire et sont, dans cet exemple, montés à force dans les trous 9A, 9B de façon à être immobilisés en position, en rotation et en translation, par rapport au corps 2 de la vanne. Ces paliers fixes 6, 7 sont réalisés, par exemple, en un matériau qui leur assure des propriétés autolubrifiantes et anticorrosives appropriées procurant une longévité renforcée. Pour cela, ils peuvent être en un alliage de cuivre et de nickel ou d'étain, ou en un acier inoxydable. More particularly, two aligned holes 9A, 9B are formed in the body 2, perpendicular to the conduit 3, passing diametrically through it, to form housings, of circular section, of passage of the shaft 4. They respectively receive the connecting means pivots, namely the two bearings 6, 7. These are cylindrical annular section and are, in this example, forcibly mounted in the holes 9A, 9B so as to be immobilized in position, in rotation and in translation, relative to the body 2 of the valve. These fixed bearings 6, 7 are made, for example, of a material which provides them self-lubricating properties and anticorrosive appropriate providing increased durability. For this, they can be made of an alloy of copper and nickel or tin, or a stainless steel.
Dans ces deux paliers 6, 7 est reçu l'arbre 4 qui peut ainsi pivoter librement autour de l'axe A, par un ajustement glissant prévu entre l'arbre et les paliers. L'extrémité 1 1 de l'arbre, qualifiée d'inférieure par rapport à la figure 1 , s'engage dans le palier correspondant 6, tandis que l'autre extrémité supérieure 12 traverse l'autre palier 7 et débouche vers l'extérieur du corps 2 de la vanne 1 pour être reliée à un organe 21 de commande en rotation de l'arbre 4.  In these two bearings 6, 7 is received the shaft 4 which can thus freely rotate about the axis A, by a sliding fit provided between the shaft and the bearings. The end 1 1 of the shaft, described as lower than that of FIG. 1, engages in the corresponding bearing 6, while the other upper end 12 passes through the other bearing 7 and opens outwards. of the body 2 of the valve 1 to be connected to a member 21 for controlling the rotation of the shaft 4.
Comme cela est plus visible à la figure 2, l'organe de commande 21 est, par exemple, une roue à secteur denté 22 comprenant une partie centrale 24 centré sur l'arbre 4 et une excroissance radiale 26, formant un secteur d'angle légèrement supérieur au débattement angulaire du volet et munie de dents d'engrenage 28.  As is more visible in FIG. 2, the control member 21 is, for example, a toothed sector wheel 22 comprising a central portion 24 centered on the shaft 4 and a radial protuberance 26, forming a corner sector. slightly greater than the angular clearance of the flap and provided with gear teeth 28.
Si l'on se reporte de nouveau à la figure 1 , on constate que le secteur denté 22 est ici lié en rotation à une roue de renvoie 30 libre en rotation par rapport au corps 2 autour d'un axe d'articulation 32 parallèle à l'axe longitudinal A de l'arbre 4. La vanne 1 comprend en outre, un moteur électrique, non illustré, notamment un moteur pas à pas. Le moteur électrique engrène sur un grand pignon 36 de la roue de renvoi 30 tandis que le secteur denté 22 engrène sur un petit pignon 37 de cette dernière. L'actionnement du moteur entraine de la sorte une rotation de la roue de renvoie 30 qui entraine à son tour une rotation du secteur denté 22 et donc du volet 5 par l'intermédiaire de l'arbre 4. L'organe de commande 21 , la roue intermédiaire 30 et/ou le moteur sont positionnés dans un logement 38 de la vanne fermé par un couvercle 40. Referring again to FIG. 1, it can be seen that the toothed sector 22 is here rotatably connected to a return wheel 30 free in rotation with respect to the body 2 about an axis of articulation 32 parallel to the longitudinal axis A of the shaft 4. The valve 1 further comprises an electric motor, not shown, including a stepper motor. The electric motor meshes with a large pinion 36 of the idler wheel 30 while the toothed sector 22 meshes with a small pinion 37 of the latter. The actuation of the motor thus causes a rotation of the return wheel 30 which in turn causes rotation of the toothed sector 22 and thus of the flap 5 via the shaft 4. The control member 21, the intermediate wheel 30 and / or the motor are positioned in a housing 38 of the valve closed by a cover 40.
La vanne peut encore comprendre un ressort de torsion 42 permettant de positionner le volet 5 dans une position de repos, ici une position ouverte. En d'autres termes, le ressort de torsion 42 est un ressort de rappel en position de l'organe de commande 21 . Par position de repos, on entend une position prise lorsque le moteur de la vanne n'est pas actionné. Le ressort de torsion 42 prend appui, d'une part sur le corps 2, ici par l'intermédiaire d'un épaulement supérieur 44, et sur l'organe de commande 21 , au niveau d'une fente 46 (figure 2). Le ressort de torsion 42 est centré, notamment, sur l'axe longitudinal A.  The valve may further comprise a torsion spring 42 for positioning the flap 5 in a rest position, here an open position. In other words, the torsion spring 42 is a return spring in position of the control member 21. By position of rest, one hears a position taken when the motor of the valve is not actuated. The torsion spring 42 is supported, on the one hand on the body 2, here via an upper shoulder 44, and on the control member 21, at a slot 46 (Figure 2). The torsion spring 42 is centered, in particular, on the longitudinal axis A.
L'organe de commande 21 est ici surmoulé sur l'arbre 4. On assure de la sorte une solidarisation sans jeu entre ces deux pièces. On peut de plus les préassembler avant montage dans le corps 2.  The control member 21 is overmolded on the shaft 4. In this way there is ensured a connection without play between these two parts. We can also pre-assemble them before mounting in the body 2.
L'organe de commande 21 est, par exemple, en matériau plastique et/ou l'arbre est, par exemple, en métal, notamment en acier inoxydable.  The control member 21 is, for example, plastic material and / or the shaft is, for example, metal, especially stainless steel.
L'organe de commande 21 comprend ici des parois formant un puits 48, s'étendant axialement au-delà d'une paroi 50 s'étendant radialement, notamment orthogonalement à l'arbre 4, et portant les dents d'engrenage 28. L'organe de commande est surmoulé sur l'arbre 4 au niveau du puits 48. L'arbre peut en outre comprendre une gorge 52 dans laquelle l'organe de commande 4 est surmoulé. Le puits 48 et/ou la gorge 52 contribuent à une solidarisation efficace de l'organe de commande 21 et de l'arbre.  The control member 21 here comprises walls forming a well 48, extending axially beyond a wall 50 extending radially, in particular orthogonal to the shaft 4, and carrying the gear teeth 28. L control member is overmolded on the shaft 4 at the well 48. The shaft may further comprise a groove 52 in which the control member 4 is overmolded. The well 48 and / or the groove 52 contribute to an effective connection of the control member 21 and the shaft.
La vanne 1 peut aussi comprendre une platine 54, notamment métallique, définissant une ou des butées radiales 56, 56' (figures 2 et 3) délimitant une course angulaire de l'organe de commande 21 . Plus précisément, la platine 54 est liée en rotation à l'arbre 4 et surmoulée par l'organe de commande 21 . Par ailleurs, dans les positions angulaires extrêmes de la vanne 1 , les butées radiales 56, 56' viennent en contact de formes, non-visibles, ménagées dans le corps 2 de la vanne. On définit de la sorte le débattement angulaire de l'organe de commande 21 . Comme mieux visible à la figure 3, la platine 54 comprend deux bras radiaux 58, 58' respectivement terminés par les butées radiales 56, 56'. The valve 1 may also comprise a plate 54, in particular a metal plate, defining one or more radial stops 56, 56 '(FIGS. 2 and 3) delimiting an angular stroke of the control member 21. More specifically, the plate 54 is rotatably connected to the shaft 4 and overmolded by the control member 21. Furthermore, in the extreme angular positions of the valve 1, the radial stops 56, 56 'come into contact with non-visible shapes formed in the body 2 of the valve. In this way, the angular displacement of the control member 21 is defined. As best seen in Figure 3, the plate 54 comprises two radial arms 58, 58 'respectively terminated by the radial stops 56, 56'.
La platine 54 présente en outre, à l'intersection des bras 58, 58', un orifice 60 de passage de l'arbre 4. L'arbre 4 et l'orifice de passage 60 sont mutuellement configurés pour assurer une transmission des efforts de butée radiale de la platine 54 à l'arbre 4. L'arbre 4 présente ici pour cela un méplat 62 (figure 1 ) et l'orifice de passage 60 une portion droite 64. L'arbre 4 est ajusté dans l'orifice de passage 60 de manière que le méplat 62 prenne appui contre la portion droite 64. Le secteur denté 22 n'est ainsi pas sollicité lors des chocs en butée de la platine 54 contre le corps 2.  The plate 54 also has, at the intersection of the arms 58, 58 ', an orifice 60 for the passage of the shaft 4. The shaft 4 and the through hole 60 are mutually configured to ensure a transmission of the forces of Radial abutment of the plate 54 to the shaft 4. The shaft 4 here has a flat portion 62 (Figure 1) and the passage hole 60 a straight portion 64. The shaft 4 is adjusted in the hole of passage 60 so that the flat 62 bears against the straight portion 64. The toothed sector 22 is thus not biased during abutments of the plate 54 against the body 2.
Si l'on se reporte à nouveau aux figures 1 et 2, on constate que la vanne 1 comporte en outre une cible de capteur 66. Il s'agit, par exemple, d'une cible de capteur magnétique, comme un aimant plat, c'est-à-dire d'un aimant parallélépipédique rectangle dont les deux plus grandes faces sont disposées perpendiculairement à l'axe de rotation A de l'organe de commande 21 . L'aimant 66 génère un champ magnétique destiné à influer sur un capteur magnétique 68, notamment une sonde à effet Hall, ici positionné sur le couvercle 40 de la vanne 1 .  Referring again to FIGS. 1 and 2, it can be seen that the valve 1 further comprises a sensor target 66. It is, for example, a magnetic sensor target, such as a flat magnet, that is to say a rectangular parallelepipedic magnet whose two largest faces are arranged perpendicular to the axis of rotation A of the control member 21. The magnet 66 generates a magnetic field for influencing a magnetic sensor 68, in particular a Hall effect probe, here positioned on the cover 40 of the valve 1.
L'aimant plat 66 est sensiblement parallélépipédique rectangle. Il présente deux faces orientées de façon orthogonale à l'axe longitudinal A de l'arbre 4. Il est en outre centré sur l'axe longitudinal A. L'aimant plat génère localement de la sorte des lignes de champs parallèles, dans un plan orthogonal à l'axe longitudinal A. Ainsi, le positionnement angulaire de l'organe de commande 21 et donc la position du volet 5 correspondent à un positionnement angulaire identique des lignes de champs, ce qui fiabilise la mesure.  The flat magnet 66 is substantially rectangular parallelepiped. It has two faces oriented orthogonal to the longitudinal axis A of the shaft 4. It is also centered on the longitudinal axis A. The flat magnet locally generates in this manner parallel field lines, in a plane orthogonal to the longitudinal axis A. Thus, the angular positioning of the control member 21 and therefore the position of the flap 5 correspond to an identical angular positioning of the field lines, which makes the measurement more reliable.
La vanne 1 comprend en outre un logement 70 de réception de la cible de capteur 66. Le logement 70 est avantageusement issu du moulage de l'organe de commande 21 de manière à également réduire les jeux angulaires entre les pièces mobiles de la vanne 1 . Une telle façon de réaliser le logement 70 permet également de limiter le nombre d'opérations nécessaires à la fabrication de la vanne. La cible de capteur 66 est cependant insérée dans le logement 70, postérieurement à la formation de ce logement 70. Ainsi, le logement 70 n'est pas obtenu par surmoulage de la cible de capteur 66. Ceci permet d'éviter d'endommager la cible de capteur durant l'opération de moulage de l'organe de commande 21 . The valve 1 further comprises a housing 70 for receiving the sensor target 66. The housing 70 is advantageously derived from the molding of the control member 21 so as to also reduce the angular gaps between the moving parts of the valve 1. Such a way of producing the housing 70 also makes it possible to limit the number of operations necessary for the manufacture of the valve. The sensor target 66 is, however, inserted in the housing 70, after the formation of this housing 70. Thus, the housing 70 is not obtained by overmolding the sensor target 66. This makes it possible to avoid damaging the sensor target during the molding operation of the control member 21.
Cependant, le logement 70 est formé ici de quatre parois 72.  However, the housing 70 is formed here of four walls 72.
Le logement 70 et la cible de capteur 66 présentent de préférence des formes complémentaires, notamment des formes de parallélépipède rectangle. La cible de capteur 66 est, par exemple, positionné à plat sur un fond du logement 70.  The housing 70 and the sensor target 66 preferably have complementary shapes, including rectangular parallelepiped shapes. The sensor target 66 is, for example, positioned flat on a bottom of the housing 70.
Les parois 72 du logement 70 présentent en outre une languette 74, en saillie selon l'axe A de rotation de l'organe de commande 21 . Ces languettes 74 sont rabattues sur la cible de capteur 66 pour assurer son maintien dans le logement 70, une fois la cible de capteur 66 insérée dans le logement 70.  The walls 72 of the housing 70 also have a tongue 74 projecting from the axis A of rotation of the control member 21. These tabs 74 are folded over the sensor target 66 to ensure its retention in the housing 70, once the sensor target 66 inserted into the housing 70.
L'arbre 4 tel qu'illustré aux figures comprend par ailleurs une butée axiale 76, située au niveau de l'extrémité 1 1 de l'arbre, opposée à l'organe de commande 21 (c'est-à-dire opposée à l'extrémité de l'arbre 4 au niveau de laquelle est fixée l'organe de commande 21 ). Dans la suite, on appelle cette extrémité 1 1 l'extrémité distale de l'arbre 4, en référence à l'organe de commande 21 qui est fixé au niveau de l'extrémité proximale de l'arbre 4. On facilite de la sorte le montage dans le corps 2 de l'ensemble mobile formé par l'organe de commande 21 et l'arbre 4. En effet, le segment longitudinal 78 de l'arbre 4 s'étendant du volet obturateur 5 à l'organe de commande 21 n'a pas alors à coopérer avec une butée axiale, celle-ci étant prévue en partie distale de l'arbre 4. Le segment 78 est appelé par la suite zone libre. Cette butée axiale 76 permet de maintenir en position axiale le volet obturateur 5 dans le conduit 3, en coopération avec le corps de vanne 2, à rencontre d'un effort de traction du ressort de rappel en torsion 42 sur l'arbre 4. Cet effort de traction tend à retirer l'arbre 4 des trous 9A et 9B. La zone libre 78 est plus particulièrement située ici d'une extrémité supérieure 80 d'une fente 82 de fixation du volet obturateur 5 à une extrémité inférieure 84 du puits 48. Autrement dit, la zone libre 78 est située au droit du passage 9B de l'arbre de commande 4 vers le logement 38 accueillant l'organe de commande 21 . The shaft 4 as illustrated in the figures also comprises an axial abutment 76, located at the end 1 1 of the shaft, opposite the control member 21 (that is to say opposite to the end of the shaft 4 at which is fixed the control member 21). In the following, this end 1 1 is called the distal end of the shaft 4, with reference to the control member 21 which is fixed at the proximal end of the shaft 4. the mounting in the body 2 of the moving assembly formed by the control member 21 and the shaft 4. Indeed, the longitudinal segment 78 of the shaft 4 extending from the shutter 5 to the control member 21 does not have to cooperate with an axial stop, the latter being provided in the distal portion of the shaft 4. The segment 78 is called thereafter free zone. This axial abutment 76 makes it possible to keep the shutter 5 in the axial position in the duct 3, in cooperation with the valve body 2, against a tensile force of the torsion return spring 42 on the shaft 4. Traction effort tends to remove the shaft 4 from the holes 9A and 9B. The free zone 78 is more particularly located here from an upper end 80 of a slot 82 for fixing the shutter 5 to a lower end 84 of the well 48. In other words, the free zone 78 is located at the right of the passage 9B of the control shaft 4 towards the housing 38 accommodating the control member 21.
Ici, la butée axiale 76 comprend une rondelle 102 plate, fixée sur l'extrémité latérale 1 1 distale de l'arbre 4, c'est-à-dire sur la surface circulaire de cette extrémité distale 1 1 de l'arbre 4, perpendiculaire à l'axe A de l'arbre 4. L'utilisation d'une rondelle plate 102 permet de réalisée une butée avec un faible encombrement axial. La fixation de la rondelle plate 102 sur l'extrémité latérale de l'arbre permet d'éviter l'obligation de procéder à des traitements de surfaces coûteux.  Here, the axial abutment 76 comprises a flat washer 102, fixed on the distal end 1 1 of the shaft 4, that is to say on the circular surface of this distal end 1 1 of the shaft 4, perpendicular to the axis A of the shaft 4. The use of a flat washer 102 allows for a stop with a small axial size. Fixing the flat washer 102 on the lateral end of the shaft avoids the obligation to carry out expensive surface treatments.
La fixation de la rondelle plate 102 sur l'extrémité distale 1 1 de l'arbre 4 peut notamment être réalisée par soudure. De préférence, le cordon de soudure entre la rondelle 102 et l'extrémité distale 1 1 de l'arbre s'étend sur un secteur angulaire de 360°, le cordon formant de préférence encore un cercle. Bien entendu, le cordon de soudure peut présenter d'autres formes ; il peut également être discontinu.  Fixing the flat washer 102 on the distal end 1 1 of the shaft 4 may in particular be made by welding. Preferably, the weld bead between the washer 102 and the distal end 11 of the shaft extends over an angular sector of 360 °, the cord preferably still forming a circle. Of course, the weld bead may have other shapes; it can also be discontinuous.
Pour assurer l'alignement de la rondelle 102, c'est-à-dire notamment que l'axe de la rondelle est aligné ou tout du moins parallèle à l'axe de l'arbre, il peut être prévu une gorge sur la surface de l'extrémité distale 1 1 de l'arbre, cette gorge recevant le cordon de soudure mis en œuvre pour souder la rondelle 102 sur l'arbre 4. Ainsi, ce cordon de soudure n'implique pas une surépaisseur par rapport à la surface de l'extrémité distale 1 1 de l'arbre 4 et la rondelle 102 repose sur sensiblement toute la surface de l'extrémité latérale de l'arbre ne formant pas la gorge.  To ensure the alignment of the washer 102, that is to say in particular that the axis of the washer is aligned or at least parallel to the axis of the shaft, it can be provided a groove on the surface of the distal end 1 1 of the shaft, this groove receiving the weld bead used to weld the washer 102 on the shaft 4. Thus, this weld bead does not imply an extra thickness with respect to the surface of the distal end 1 1 of the shaft 4 and the washer 102 rests on substantially the entire surface of the lateral end of the shaft not forming the groove.
De manière préférée, cette gorge 104 est, comme représentée à la figure 4, réalisée au pied ou à la base d'un téton de centrage 106 formé à la surface de l'extrémité latérale 1 1 et destiné à coopérer avec l'ouverture centrale dans la rondelle 102 pour assurer le centrage de cette rondelle 102 par rapport à l'arbre 4. De manière avantageuse, le téton de centrage 106 est formé par un usinage de l'extrémité distale 1 1 de l'arbre 4, lequel usinage forme naturellement une gorge au pied du téton 106. La section de la gorge 104 est ici représentée en forme de demi-cercle, mais cette section peut être de forme différente. Notamment, la section de la gorge peut présenter un chanfrein sur une partie radialement extérieure. La gorge 104 permet également de minimiser les concentrations de contraintes mécaniques dans l'arbre 4. Preferably, this groove 104 is, as represented in FIG. 4, made at the foot or at the base of a centering stud 106 formed on the surface of the lateral end 1 1 and intended to cooperate with the central opening. in the washer 102 to ensure the centering of this washer 102 relative to the shaft 4. Advantageously, the centering pin 106 is formed by machining the distal end 1 1 of the shaft 4, which machining naturally forms a groove at the foot of the pin 106. The section of the groove 104 is here represented in the form of a semicircle, but this section can be of different shape. In particular, the section of the groove may have a chamfer on a radially outer portion. The groove 104 also makes it possible to minimize the concentrations of mechanical stresses in the shaft 4.
La butée axiale 76 et le corps 2 sont, de manière avantageuse, mutuellement configurés pour bloquer axialement la rondelle 102 sur le corps 2 dans un premier sens, orienté vers l'organe de commande 21 , le premier sens correspondant au sens d'un effort axial imprimé à l'arbre par le ressort de torsion 42.  The axial stop 76 and the body 2 are, advantageously, mutually configured to axially lock the washer 102 on the body 2 in a first direction, facing the control member 21, the first direction corresponding to the direction of a force axial printed to the shaft by the torsion spring 42.
Ici, le palier 6 est interposé entre la rondelle 102 et le corps de vanne 2. Pour assurer un guidage efficace de l'arbre 4, ce palier 6 épaulé est ici reçu dans un logement de forme complémentaire formé par un épaulement dans le corps de vanne 102. La rondelle 102 maintient ce palier 6 contre le corps de vanne 2.  Here, the bearing 6 is interposed between the washer 102 and the valve body 2. In order to ensure efficient guiding of the shaft 4, this stepped bearing 6 is here received in a housing of complementary shape formed by a shoulder in the body of valve 102. The washer 102 maintains this bearing 6 against the valve body 2.
Par ailleurs, la vanne est configurée pour que la butée axiale soit aussi bloquée axialement dans un second sens, opposé au premier sens.  Furthermore, the valve is configured so that the axial stop is also locked axially in a second direction, opposite to the first direction.
Comme évoqué plus haut et comme cela est plus visible à la figure 2, l'organe de commande 21 comprend une fente 46. Cette dernière accueille une extrémité d'un ressort de torsion 42, non-illustré à cette figure mais visible sur la figure 1 . La fente 46 traverse axialement la paroi 50 de l'organe de commande 21 . La fente 46 définit avantageusement deux positions d'accrochage pour le ressort de torsion 42.  As mentioned above and as is more visible in Figure 2, the control member 21 comprises a slot 46. The latter accommodates one end of a torsion spring 42, not shown in this figure but visible in the figure 1. The slot 46 passes axially through the wall 50 of the control member 21. The slot 46 advantageously defines two attachment positions for the torsion spring 42.
La fente 46 est orientée, par exemple, selon un secteur d'angle, centré sur l'axe longitudinal A de l'arbre 4. La fente 46 définit de la sorte une position d'accrochage du ressort de torsion 42 à chacune de ses extrémités angulaires.  The slot 46 is oriented, for example, along a corner sector, centered on the longitudinal axis A of the shaft 4. The slot 46 defines in this way an attachment position of the torsion spring 42 at each of its angular ends.
Le corps de vanne est réalisé préalablement au montage des pièces évoquées plus haut dans le corps de vanne 2, par exemple par moulage. Le montage des pièces peut alors avoir lieu de la façon suivante. Un joint d'étanchéité 100 et les paliers supérieur 7 et inférieur 6 sont disposés dans le corps 2 respectivement au niveau d'épaulements respectifs dont le premier épaulement. L'ensemble palier supérieur 7 et joint d'étanchéité 100 peut, en variante, être remplacé par une douille de guidage de l'arbre 4 avec un joint intégré. The valve body is made prior to mounting the parts mentioned above in the valve body 2, for example by molding. The assembly of the parts can then take place as follows. A seal 100 and the upper 7 and lower 6 bearings are arranged in the body 2 respectively at respective shoulders, the first shoulder. The upper bearing assembly 7 and seal 100 may, alternatively, be replaced by a guide sleeve of the shaft 4 with an integrated seal.
L'ensemble mobile comportant l'organe de commande 21 et l'arbre 4 est alors monté dans les trous de passage 9A, 9B en étant introduit du haut vers la bas, le ressort de torsion 42 ayant été installé entre l'organe de commande 21 et le corps 2.  The movable assembly comprising the control member 21 and the shaft 4 is then mounted in the through holes 9A, 9B being introduced from top to bottom, the torsion spring 42 having been installed between the control member 21 and the body 2.
La rondelle 102 est alors centrée sur l'extrémité distale 1 1 de l'arbre au moyen du téton de centrage 106, qui est de préférence usiné sur l'arbre 4, préalablement à l'insertion de celui-ci dans le corps de vanne. La rondelle plate 102 es alors fixée notamment soudée, sur la surface de l'extrémité distale 1 1 de l'arbre 4. Le cordon de soudure est dans ce cas formé dans la gorge 104 comme évoqué ci-avant.  The washer 102 is then centered on the distal end 1 1 of the shaft by means of the centering stud 106, which is preferably machined on the shaft 4, prior to the insertion thereof into the valve body. . The flat washer 102 is then fixed in particular welded on the surface of the distal end 1 1 of the shaft 4. The weld bead is in this case formed in the groove 104 as mentioned above.
De manière préférée, durant cette étape de soudure de la rondelle 102 sur l'extrémité distale 1 1 de l'arbre, la rondelle 102 est soumise à un double effort :  Preferably, during this step of welding the washer 102 on the distal end 1 1 of the shaft, the washer 102 is subjected to a double force:
- un effort P1 de plaquage de la rondelle 102 sur le palier 6 (ou sur le corps de vanne 2 en l'absence du palier 6), et  a plowing force P1 of the washer 102 on the bearing 6 (or on the valve body 2 in the absence of the bearing 6), and
- un effort P2 de plaquage de l'arbre 4 sur la rondelle 102,  a plating effort P2 of the shaft 4 on the washer 102,
tel que P1 > P2 pour que la rondelle soit constamment en butée contre le palier 6 (ou le corps de vanne 2 en l'absence du palier 6). Ce double effort sur la rondelle permet de maximiser la surface de maintien et d'optimiser la perpendicularité de la rondelle plate 102 par rapport à l'axe A de l'arbre 4, une fois la rondelle plate 102 soudée. such that P1> P2 so that the washer is constantly in abutment against the bearing 6 (or the valve body 2 in the absence of the bearing 6). This double force on the washer maximizes the holding surface and optimize the perpendicularity of the flat washer 102 relative to the axis A of the shaft 4, once the flat washer 102 welded.
Une vanne telle qu'elle vient d'être décrite trouve ses applications en particulier en tant que vanne de circulation de fluide pour véhicule automobile. En particulier, une telle vanne peut être utilisée comme vanne doseuse de gaz d'admission de moteurs à combustion interne ou comme vanne de recirculation des gaz d'échappement ou vanne EGR. A valve as just described finds its applications in particular as a fluid circulation valve for a motor vehicle. In particular, such a valve can be used as a gas metering valve internal combustion engines or as an exhaust gas recirculation valve or EGR valve.
L'invention ne se limite pas au seul exemple de réalisation décrit ci- avant en regard des figures, à titre d'exemple illustratif et non limitatif.  The invention is not limited to the single embodiment described above with reference to the figures, by way of illustrative and non-limiting example.
Notamment, la gorge 104 peut être réalisée à tout niveau radial sur la surface de l'extrémité distale 1 1 de l'arbre 4, même si la gorge présentée présente l'avantage de ne pas nécessiter d'opération supplémentaire pour être réalisée, puisqu'elle est formée naturellement par l'usinage de l'extrémité distale 1 1 de l'arbre 4 pour former le téton de centrage 106.  In particular, the groove 104 can be made at any radial level on the surface of the distal end 11 of the shaft 4, even if the groove presented has the advantage of not requiring any additional operation to be performed, since it is formed naturally by the machining of the distal end 1 1 of the shaft 4 to form the centering stud 106.

Claims

REVENDICATIONS
1 . Vanne de circulation de fluide, notamment pour véhicule automobile, comportant un corps de vanne (2) présentant un conduit (3) de passage d'un fluide, un volet (5) obturateur du conduit (3), un arbre (4) sur lequel est fixé le volet obturateur (5), un organe (21 ) rotatif de commande de l'arbre (4), fixé au niveau d'une extrémité proximale (12) de l'arbre (4) et dont la rotation commande sélectivement l'ouverture et la fermeture du conduit (3) par le volet obturateur (5), et un ressort de rappel (42) en torsion de l'organe de commande (21 ), une butée (76) étant prévue au niveau d'une extrémité distale (1 1 ) de l'arbre (4), opposée à l'extrémité proximale (12), pour maintenir en position axiale le volet obturateur (5) dans le conduit (3) par coopération avec le corps de vanne (2), contre un effort du ressort de rappel (42), la butée (76) comportant une rondelle plate (102) fixée sur l'extrémité latérale (1 1 ) de l'arbre (4), l'extrémité latérale (1 1 ) sur laquelle est fixée la rondelle plate (102) présentant une gorge circulaire (104), le cordon de soudure entre l'extrémité latérale (1 1 ) de l'arbre (4) et la rondelle plate (102) étant reçu dans la gorge (104). 1. Fluid circulation valve, particularly for a motor vehicle, comprising a valve body (2) having a conduit (3) for the passage of a fluid, a shutter (5) for shutting off the conduit (3), a shaft (4) on which is fixed the shutter (5), a member (21) rotary control shaft (4), fixed at a proximal end (12) of the shaft (4) and whose rotation selectively controls opening and closing the conduit (3) by the shutter (5), and a torsion spring (42) of the control member (21), a stop (76) being provided at the level of a distal end (1 1) of the shaft (4), opposite to the proximal end (12), for maintaining in axial position the shutter (5) in the conduit (3) by cooperation with the valve body ( 2), against a force of the return spring (42), the stop (76) having a flat washer (102) fixed on the lateral end (1 1) of the shaft (4), the lateral end (1) 1) on the wherein the flat washer (102) having a circular groove (104) is attached, the weld bead between the lateral end (1 1) of the shaft (4) and the flat washer (102) being received in the groove ( 104).
2. Vanne selon la revendication 1 , dans laquelle l'extrémité latéraleValve according to claim 1, wherein the lateral end
(1 1 ) sur laquelle est fixée la rondelle plate (102) présente un téton de centrage (106), la gorge (104) étant, de préférence, formée à la base du téton de centrage (106). (1 1) on which is fixed the flat washer (102) has a centering stud (106), the groove (104) being preferably formed at the base of the centering stud (106).
3. Vanne selon l'une des revendications 1 ou 2, dans laquelle un palier (6) distal de guidage en rotation de l'arbre (4) par rapport au corps de vanne (2) est interposé entre la rondelle plate (102) et le corps de vanne (2), la rondelle plate (2) maintenant en contact le palier distal (6) contre le corps de vanne (2). 3. Valve according to one of claims 1 or 2, wherein a bearing (6) distal guide rotation of the shaft (4) relative to the valve body (2) is interposed between the flat washer (102). and the valve body (2), the flat washer (2) maintaining the distal bearing (6) in contact with the valve body (2).
4. Vanne selon la revendication 3, dans laquelle le corps de vanne (2) présente un épaulement formant un logement de réception du palier distal (6). 4. Valve according to claim 3, wherein the valve body (2) has a shoulder forming a receiving housing of the distal bearing (6).
5. Vanne selon l'une quelconque des revendications précédentes, comprenant un palier proximal (7) de guidage en rotation de l'arbre (4) par rapport au corps de vanne (2), opposé, par rapport au volet obturateur (5), à la rondelle plate (102), un joint (100) étant de préférence disposé axialement entre le palier proximal (7) et le corps de vanne (2). 5. Valve according to any one of the preceding claims, comprising a proximal bearing (7) for guiding rotation of the shaft (4) with respect to the valve body (2), opposite, with respect to the shutter (5). at the flat washer (102), a seal (100) is preferably axially disposed between the proximal bearing (7) and the valve body (2).
6. Vanne selon l'une quelconque des revendications 1 à 4, comprenant une douille de guidage en rotation de l'arbre (4) par rapport au corps de vanne (2), avec un joint intégré, opposée, par rapport au volet obturateur (5), à la rondelle plate (102). 6. Valve according to any one of claims 1 to 4, comprising a guide sleeve in rotation of the shaft (4) with respect to the valve body (2), with an integrated seal, opposite, relative to the shutter (5), to the flat washer (102).
7. Procédé de fabrication d'une vanne (1 ) selon l'une quelconque des revendications précédentes, notamment d'une vanne pour véhicule automobile, comprenant les étapes consistant à : 7. A method of manufacturing a valve (1) according to any one of the preceding claims, in particular a valve for a motor vehicle, comprising the steps of:
a) mouler un corps de vanne (2) présentant un conduit (3) à obturer au moyen d'un volet obturateur (5),  a) molding a valve body (2) having a duct (3) to be closed by means of a shutter (5),
b) insérer un arbre (4) dans le corps de vanne (2) pour que le volet obturateur (5) soit reçu dans le conduit (3), et  b) inserting a shaft (4) in the valve body (2) so that the shutter (5) is received in the conduit (3), and
c) fixer une rondelle plate (102) sur une extrémité latérale (1 1 ) de l'arbre (4) opposée à un organe de commande (21 ).  c) fixing a flat washer (102) on a lateral end (1 1) of the shaft (4) opposite to a control member (21).
8. Procédé selon la revendication 7, dans laquelle la rondelle (102) est soudée sur l'extrémité latérale (1 1 ) de l'arbre (4), le cordon de soudure étant de préférence formé dans une gorge (104). 8. The method of claim 7, wherein the washer (102) is welded to the lateral end (1 1) of the shaft (4), the weld bead being preferably formed in a groove (104).
9. Procédé selon la revendication 7 ou 8, dans lequel, pendant la soudure, un effort (P1 ) de plaquage de la rondelle (102) sur le corps de vanne (2) ou un palier distal (6), et un effort (P2) de plaquage de l'arbre (4) sur la rondelle plate (102) sont appliqués, l'effort (P1 ) de plaquage de la rondelle plate (102) sur le corps de vanne (2), ou le palier distal (6), étant supérieur à l'effort (P2) de plaquage de l'arbre (4) sur la rondelle plate (102). 9. The method of claim 7 or 8, wherein, during the welding, a force (P1) of plating the washer (102) on the valve body (2) or a distal bearing (6), and a force ( P2) for plating the shaft (4) on the flat washer (102) are applied, the plating force (P1) of the flat washer (102) on the valve body (2), or the distal bearing (6) being greater than the force (P2) of pressing the shaft (4) onto the flat washer (102).
10. Procédé selon l'une des revendications 7 à 9, comprenant une étape de formation d'un téton de centrage (106) sur l'extrémité latérale (1 1 ) de l'arbre (4), destinées à être l'extrémité opposée de l'arbre (4) par rapport à l'organe de commande (21 ), et d'une gorge (104) à la base du téton (106). 10. Method according to one of claims 7 to 9, comprising a step of forming a centering pin (106) on the lateral end (1 1) of the shaft (4), intended to be the end opposed to the shaft (4) relative to the control member (21), and a groove (104) at the base of the stud (106).
EP15759856.6A 2014-07-23 2015-07-20 Fluid-circulation valve, in particular for a motor vehicle, with thrust washer and method for manufacturing such a valve Ceased EP3172468A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1457086A FR3024200B1 (en) 2014-07-23 2014-07-23 FLUID CIRCULATION VALVE, IN PARTICULAR FOR MOTOR VEHICLE, WITH STOP WASHER AND METHOD FOR MANUFACTURING SUCH VALVE
PCT/FR2015/051995 WO2016012710A1 (en) 2014-07-23 2015-07-20 Fluid-circulation valve, in particular for a motor vehicle, with thrust washer and method for manufacturing such a valve

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EP (1) EP3172468A1 (en)
JP (1) JP2017522513A (en)
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DE102020103420A1 (en) * 2020-02-11 2021-08-12 Friedrich Boysen GmbH & Co KG. Flap device
CN113719617B (en) * 2021-08-13 2023-06-09 拓姆菲阀门科技有限公司 Butterfly valve capable of automatically detecting and cleaning sealing state

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US4880207A (en) * 1987-03-02 1989-11-14 Mitsubishi Denki Kabushiki Kaisha Intake throttle valve return device of engine
DE10019735A1 (en) * 2000-04-20 2001-10-25 Mannesmann Vdo Ag Throttle body with a housing and a throttle valve shaft secured in a housing by means of an axial lock, and method for producing an axial lock for a throttle valve shaft in a housing of a throttle body
JP2004300944A (en) * 2003-03-28 2004-10-28 Denso Corp Throttle device for internal combustion engine
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JP5172183B2 (en) * 2007-03-20 2013-03-27 Ｎｔｎ株式会社 Outer joint member of constant velocity universal joint
DE102010015828A1 (en) * 2010-04-20 2011-10-20 Carl Freudenberg Kg Power transmission element has annular projection that is provided with outer circumference and rotary element provided with inner circumference, where inner circumference is provided opposite to the outer circumference
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FR2992046B1 (en) * 2012-06-15 2015-05-01 Valeo Sys Controle Moteur Sas FLUID CIRCULATION VALVE, IN PARTICULAR FOR A MOTOR VEHICLE

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CN106662258A (en) 2017-05-10
JP2017522513A (en) 2017-08-10

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